摘要
对板桁组合钢梁进行非线性有限元分析。用有限个横向条带法构造了板桁组合结构极段考虑局部屈曲的空间位移模式。基于三维连续体的虚功增量方程，导出了横向条带板段单元U．L列式，用空间欧拉坐标变换考虑其位形变化，用截面塑性系数来考虑其材料非线性。应用所编程序，对广东西江桥原板行组合结构模型梁进行了非线性分析，并对其计算结果进行了一些试验验证。
In this paper, a nonlinear finite element analysis of plate - truss composite steel girder is studied. A space displacement field considering the deck local buckling for the plate - truss composite is constructed by using transverse finite stripe. The Update Lagrangian formulations of deck beam finite element in transverse stripe are induced based on the three dimensional continuum virtual work incremental equilibrium equation, and the effect of laxge deformation is taken into consideraion with Euler coordinate transformation and the effect of material nonlinear character with Inner - Foree Plasticity Cocfficient of beam cross section. A spae nonlinear character of the model of Xijian plate - miss composite steel bridge has been studied with author's program, and the results are verified by test data.
出处
《土木工程学报》
EI
CSCD
北大核心
2000年第2期56-62,共7页
China Civil Engineering Journal
基金
铁道部科技发展基金
湖南省科技发展基金
关键词
板桁组合钢梁
非线性有限元
横向条带板段
桥梁
plate-truss composite steel girder, nonlinear finite element, local buckling, U. L formulation
